Air draft control appliance



Nov. 2l, 1939. C. VINCENT AIR DRAFT` CONTROL APPLIANCE Filed Jan. 28,1939 v BY jm ATTORNEY.

Patented Nov. 21., 1939 f UNITED STATES ATENT OFFICE 2,180,622l Am DRAFTeoN'rRon.APrLiLANoEl Cuthbert Vincent, Omaha, Nebr. Application January2s, 1939, serial No. 253,299

1 claim. (or: 277-60) This invention relates to an air draft controlvidedfwith an'adjustably'mounted weight-mem'- appliance for preventingwaste of fuel, and is ber.

specically designed for use in connection with Fig. 4 is a front view ofthe appliance, the wings oil burners generally used on furnaces, saidoil being shown in closed position, and Fig. 5 is a 5 burners being ofvarious kinds or types, but usrear View of the same. 5 ually beingequipped with a motor-driven fan as Fig. 6 is a broken away side View inlongitudia feature intended to assist combustion of the nal sectionshowing a part of an oil burner with vaporized or atomized oil. theappliance mounted thereon.

Since chimneys vary in proportions and heights Referring 110W 60 thedrawing fOr a more Dar-1 10 the degree of draft for furnaces,comparatively, ticular description, the invention is shown and 10 willnot be uniform, and it often happens that described in connection with apart of the housan excess of chimney draft carries away unconing 'i ofan oil burner provided with a fan 8 in sumed gases. suitable bearingsfor rotation for moving air in Also there is often a loss of fuel byaction of thedirection indicated by the arrow shown in the fan ininstances when the flow of oil to the Fig. 6 to a furnace (not shown).15 burner is not uniform, or in instances when there Since theconstruction and Operation of Oil is a lack of uniformity in the qualityof oil supburners used for heating buildings are Well known ply. Alsothere may be a loss of fuel when the it is not considered necessarytoshow means for action of the motor-driven fan is not uniform rotatingthe fan, 0r i0 ShOw pipes fOr @Ondllcting as to speed. oil.

It has been observed that, according to the con- The invention consists,in part, of a cylindrical struction of oil burners now in general use,n0 hOuSing 0r SleeVe 9 having its free end formed attempt has been madeto provide means which with a downward and inward inclination asindioperate automatically to prevent an excess movecated at l0.

ment of air through the oil burner and furnace Numerals i 2 indicate apair of semicircular 25 when there is a change in speed, or when theWings hingeably mounted at their rectilinear fan ceases rotation. One ofthe objects of the edges upon a pintle Il which is disposed parallelpresent invention is to provide an air draft apwith the inclined end I0of the housing or sleeve pliance which will accomplish these purposes so9, this inclination for the pintle Il operating as 3'0 that unconsumedgases will not be 10st. an aid for an automatic movement of the Wings 30Another object of the invention is to provide i0 CIOSed DOSi'iOnanautomatic appliance which normally will Numerals i3 indicate aperturedears, and by maintain the air intake port of the oil burner means ofkeeperS i4, the l10n-Sing or sleeve 9 is in closed condition at alltimes except when the Secured to the casing or housing 1 of the oil fanis in action, and which will automatically burner, the air intake forsaid member 9 being 35 open when the fan is in operation. in registerwith the air intake of the oil burner.

Other objects of the invention will appear in In operation, rotation ofthe fan will cause the a complete and clear description hereinafter setWings t0 Swing inwardly G0 the DOSiiOn shown forth. in dotted lines inFig. 2. In order that this in- The invention consists of the new anduseful ward Swinging nlOVeInen will not Cause the wings construction,combination and arrangement of t0 be disposed relatively parallel, aspacing-block parts as described herein and claimed, and as ill5 (Fig 6)Carried by the i0!) 0f the Sleeve 9 is lustrated in the accompanyingdrawing, it being diSpOSed rearwardly 0f the pinile ll midwaybeunderstood that changes may be made in form, ilwen the wings.

size, proportions and minor details, said changes When the wings, byaCiOn 0f the fan, haveV 45 being Within the scope of the invention asmOVed inwardly i0 the DOSii1i0n ShOwn by Said claimed dotted lines inFig. 2, it is obvious that this change In the drawing, in inclinationmay tend to prevent a reverse Fig. 1 is a View in side elevation, partlybroken, Swinging mOVeIneni 0f the wings, by action of showing the airdraft control appliance. gravity, t0 CIOSed pOSiiliOn when the fanceases 50 Fig. 2 is a plan view of the appliance, the top its rotation,and therefore I have provided a pair portion of the sleeve orcylindrical housing being of weight-members I6 and have mounted thembroken away to show the' location of a pair of on the inner sides of thewings as best shown in hingeably mounted wings. Fig. 5 of the drawing,and since these weights are Fig. 3 is a sectional View showing a wingprodisposed remote from the axis of movement of 55 sad wings, the latterwill quickly respond to the action of gravity for movements to closedposition.

Numerals I1 indicate a pair of stop-members which are carried by thesleeve or housing 9 and which are disposed outwardly of the wings tolimit their outward swinging movements.

Since it is not a desirable feature, when the wings are in closedposition, to completely prevent a draft of air through a furnace, thewings are of such proportions that passageways I8 (Figs. 4, 5) willpermit a limited intake of air at all times.

It will be understood that the axis of movement for the swingingmovements of the wings should be disposed in a vertical plane at asuitable inclination relative to a horizontal plane so that theirswinging movements may be coincident and uniform.

In order that the wings may more readily move I to closed position byaction of gravity, the weightmembers I6 may be adjusted horizontally,and

may be disposed nearer to the outer edges of the wings, horizontal slotsI9 being formed in the Wings (Fig. 4), and by means of thumb-screws 2Dthe weight-members may be secured at selected distances from the axis ofmovement of said wings.

I claim as my invention:

The herein described means for air draft control comprising, incombination with a horizontal air draft pipe provided interiorly with anupwardly and outwardly inclined pintle, Ia 'pair of wings each providedwith a horizontal slot and swingably mounted on the pintle, a pair ofkeepers each engaging in a slot of a wing and 'provided with aweight-member arranged to be secured to a wing at selected distancesfrom said pintle to control the degree of swinging movement thereof fora control of air movements through said draft pipe.

CUTHBERT VINCENT.

